Fully Welded Ball Valve
Designed for buried services and transmission pipelines, Qisheng’s Fully Welded Ball Valves eliminate potential external leak paths by replacing body-to-bonnet bolting with a high-integrity welded structure. This lightweight yet robust design is ideal for gas distribution, underground networks, and high-pressure transmission. Built with trunnion-mounted internal geometry and DBB capability, it provides maintenance-free operation and exceptional durability in the most demanding environments.
Description
Qisheng High-Strength Fully Welded Ball Valve
The Qisheng Fully Welded Ball Valve is specifically engineered for long-distance pipelines and buried services where total body integrity and zero external leakage are paramount. By eliminating flanged joints in the valve body, we have removed potential leak paths, resulting in a lighter, more compact, and more structurally rigid valve. This maintenance-free design is the industry standard for safe natural gas distribution and underground fuel transmission.
Design & Operational Benefits
- Zero External Leakage: The one-piece fully welded body structure eliminates the risk of joint leakage, ensuring safety in residential gas networks and sensitive environments.
- Trunnion-Mounted Performance: Utilizes trunnion-mounted ball geometry to ensure stable sealing and low operating torque even under high-pressure pipeline conditions.
- Buried Service Design: Can be equipped with extended stems and specialized coatings for direct burial, allowing for reliable operation from ground-level gearboxes.
- DBB & DIB Capabilities: Provides Double Block and Bleed (DBB) functionality as standard, allowing for easy cavity drainage and seal integrity verification.
- Fire-Safe & Anti-Static: Fully certified to API 607/6FA standards with integrated anti-static protection for hazardous media transport.
Applications & Infrastructure
Ideally suited for critical isolation points in energy networks:
- Natural Gas Transmission: Mainlines, compressor stations, and distribution hubs.
- Heating & Cooling: Large-scale urban district heating and cooling networks.
- Fuel Pipelines: Buried liquid fuel transport lines requiring high safety factors.